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Crank gears for bicycles

A technology of crank drive and bicycle, applied in vehicle components, rider drive, power metering, etc., can solve the problem of not being able to withstand mechanical stress, etc., and achieve the effect of compact structure

Active Publication Date: 2016-03-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, special materials are often required due to the necessary magnetization properties, which are more expensive than conventional materials such as steel and often cannot withstand the same mechanical stresses

Method used

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  • Crank gears for bicycles
  • Crank gears for bicycles
  • Crank gears for bicycles

Examples

Experimental program
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Effect test

Embodiment Construction

[0029] Refer below Figure 1 to Figure 8 A crank gear 1 according to the invention for a bicycle and a bicycle with an electric auxiliary drive and a crank gear 1 of this type are described in detail.

[0030] figure 1 A schematic illustration of a bicycle 2 with an integrated electrical auxiliary or central drive is shown. as from figure 1 It can be seen that the central drive comprises crank gear 1 , electric or electromotor auxiliary drive 10 , control unit 15 , operating unit 28 and rechargeable energy source 27 . The electric-motor auxiliary drive 10 is arranged below the down tube 26 and in front of the crank gear 1 of the bicycle 2 in the direction of travel and is fixed on the down tube 26 . The crank gear 1 has a pedal crankshaft 4 , to whose free end a pedal crank 3 or a pedal crank 5 is fastened. as from figure 1 It can further be seen that the control unit 15 is fastened to the down tube 26 and communicates with the electric motor auxiliary drive 10 and the op...

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Abstract

The invention relates to a crank drive for a bicycle, comprising a pedal crank shaft (4), two pedal cranks (3, 5) fixed to the free ends of the pedal crank shaft (4), an electromotive auxiliary drive (10), and a torque sensor array (50) for detecting a torque applied to the pedal crank shaft (4), wherein the torque sensor array is configured as a capacitive sensor array (50). The invention further relates to a bicycle (2) having an electromotive auxiliary drive (10) and such a crank drive (1).

Description

technical field [0001] The invention relates to a crank drive for a bicycle, a bicycle with such a crank drive and a sensor system. Background technique [0002] For bicycles with an auxiliary drive mechanism in the form of an electric motor (these bicycles are also called "Pedelecs" or electric bicycles) sensor systems are required which detect the cyclist's pedaling frequency (desire to drive) . The sensor system should ideally be integrated in the pedal crankshaft in order to keep the signal chain from the pedal crank to the sensor system as short as possible. Especially for better behavior when starting on hills, a sensor combination for pedaling frequency and torque is desirable. [0003] Since the pedal crankshaft of a bicycle involves a fully rotating shaft, a contactless sensor system is advantageous for reasons of service life. The pedaling frequency sensor (determining the rotational speed of the pedal crankshaft) can easily be implemented as a contactless measu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L3/10G01L1/14B62M6/50
CPCB62M6/50B62M6/55G01L3/106
Inventor G·舒尔策-伊金-科纳特R·斯塔文斯基
Owner ROBERT BOSCH GMBH
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